we've got a local cat that has taken to banging on our back door until we (my gf) opens it. The cat then runs in and makes itself at home and won't go until we (I) forcibly eject it. it then starts rapping on the door again until we (my gf) opens it. this charade continues all evening. We don’t feed it or anything and it does seem to eat – it’s not completely skin and bones. I’m just not really sure why it seems to need to pester us all evening if it’s got somewhere it belongs. I’ve seen it sleeping on the left hand neighbour’s shed and the right hand neighbours garden chair but it really does seem focussed on our house. I think it might be evil. How can we get rid of this cat?